These regulators have a 1" female pipe thread inlet and outlet. These can be used with a 1" male pipe threaded filter. 1" FPT x 1" FPT.
Flow Range: 2-20 GPM
PR1S12- Max inlet pressure 90 PSI
PR1S25- Max inlet pressure 105 PSI
PR1S40- Max inlet pressre 120 PSI
